Pump



Jah. 12 ,1928. I 1569,193

A. L. LEWIS PUMP Filed June 30. 1922 2 shee'zs-sheet 1 raanaa na. 12, 1926.

Uni'rao s'rarEs PATEN ANDREW L. LEWIS, GF EETERSBURG, VIRGINIA.

PUMP.

Application filed June 30, 1922. SerialV No. 571,885.

To all 'zo/wm t may cmwcr'a Be it known that I, ANDREW L. Lewis, a citizen of the United States, residing at Petersburg, in the county of Dinwiddie and State of Virginia, have invented new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to foot operated pumps and proposes a construction in vwhich the reciprocating pumping mechanism is actuated by the weight of the operator.

Gne of the objects of the invention is the provision of a pump having a reciprocatory plunger Operating under different loads on the up and down strokes, said plunger being actuated by the uf'eight of the operator, exertcdv alternately to force said plunger to perform its upward and downward moveinents, there being means to apply the full weight of the operator to that stroke of the plunger Operating under the greater load and to impress but a component of said weight upon that strole which operates against the lighter load.

More specifically the object of the invention is to provide a 1'eciprocatory-plunger pump which lifts a column of liquid by suction upon the up stroke of the plunger and forces its discharge upon the down stroke, in which it is presumed that the discharge load is greater than the suction load, with foot rests working on opposite sides of a fulcrum or pivot, one of said foot rests being` connected directly to the plunger rod and arranged to move vertically downward under the weight of the operator, and the other being connected to said plunger rod to draw it upwardly and arranged on an inclined plane so that only a component of the uf'eight of the operator is applied to lift the plunger. I

lVith the above and other objects in View, niy invention consists in the improved pump illustrated 1n the accompanying drawings, described in the following specification, and particularly claimed, and in such variations and modifications thereof as will be obvious to those skilled in the art to which my invention relates.

In the drawings accoinpanying and forming a part of this specification, and Wherein the preferred embodiment of my invention is illustrated:

Fignre 1 is a. side elevation, partly in section showing .my improved pump installation.

Figure 2'is a plan view of the same.

Figure is a cross section taken along the line 3-3 of Figure 1.

Figure l is a side sectionall view Von an enlarged scale of a portion of the cylinder.

Figure 5 is a sideelevation of a detail of the pump Operating` mechanism showing one foot rest and Figure 6 is a side view, partly in section of the other foot rest.

Referringnow in detail to the several figures, the numeral 1 represents a well provided with the platform 2 upon which rests the pump base 3, having, depending therefrom the cylinder 4, the lower end of which dips below the water level 5. It is of course not essential that the lower end of the cylinder be submerged, but in the type of pump shown in the ill'ustration it is presumedthat the cylinderl is within suificient distance of the surface of the water to permit -the actuation of the pump by atmospheric pressure.

VVithin thelower end of the cylinder is the check valve V6, shown in Figure 4, and a discharge conduit 7 communicates with the cylinder above said check valve and is provided with the ifaucet Sand with another discharge outlet 9 which may be connected to ahose or other .piping and led to `a remote point. For the carrying out of the present invention it is presumed that the power required to discharge liquid from the pump will be greater than that necessary in lifting the water column from the well.

The plun'ger 10 of the cylinder is connected to a plunger rod 11, the top of which is provided with a cap 12 having an eye 13 formed therethrough to which is attached a rope 01' cable 14, the latter passing over a pulley 15 which is pivotally mounted in the upper horizontal limb 16 of a frame formed of channel iron and having inclined sides 17 and 18 fixedly anchored to the ground at their lower ends as shown at 18 in Figure 1.

A bracket 19, Figures 1 and 5 is secured to one side of the plunger rod and supports` a foot rest 20. X'Vhen the operator of the pump stands upon the foot rest 20 the plunger' rod 11 is forced the cylinder and the plunger 10 perfornis its discharge stroke.

The rope or cable 1a passes down from the pulley 15 between the flanges of the channel 18 where it is secured to the foot rest 21 by being passed through an aperture 22 in the back .of .said foot rest and secured in downwardly into ilO -wall of the cylinder a loop as shown in Figure 6. The foot rest 21 is supported upon an angular bracket 23 the side 28k of which slides against the bottom 25 of the channel 18, being held in sliding relation thereto by a bolt 26 passing through the side 241 of said brackct and a slot 26' in the bottom of said channel, a pair of washers 27 and 28 being arranged on said bolt outside of said relatively slidable members and held in place by the nut 29. Then the operator stands upon the foot rest 21 the plunger rodV is drawn upwardly, the plunger performing its suction stroke.

A step 30 is provided on the platform 2 upon which the operator mounts preparatory to placing his feet upon the foot rcsts 20 and 21.

The check valve 6,'shown' in Figure 4:, seats upon a fiat annular valve seat 31 formed in a depression 32 on the inner side of a bushing 33. This bushing forms the lower'end of the cylinder 4, with which it is in threaded engagement, and has an up- Standing annular flange 31k surrounding the check Valve 6 and of slightly greater' diameter than said check valve, the flange '81k being also spaced a slight distance from the 4. A pin 85 extends across the flange'84z being secured to opposite sides thereof and forms a limit stop for determining the eXtent of opening movement of said valve. The flange 8a is pro- Vided with ports 86 which are adapted to permit a lateral fiow into the annular space between said fiange and the wall of the cylinder,A sufficient to supply the demands of the outlet conduit 7 by having the valve 32 travel lwithin the lvertical guideway formed by the flange 84 and slightly spaced from the wall thereof. The outlet into the cylinder is restricted increasing the Velocity of the water fiowing into said cylinder and insuring` that gravel or other sedimcntary matter will not lodge or collcct upon the valve Seat 31.

The space between the fiange 34 and the wall of the cylinder functions as a trap to catch the sedimentary particles scraped from the walls of the cylinder from time to time by the plunger 10, preventing such matter from falling upon the check valve. The ports 86 opening into this narrow annular space permit 'a relatively violent circulation `of water in said' space fiushing it of said deposits, which are discharged by way the conduit 7 t will .be understood that various changes may be made in the form and relation of parts to suitrdilfercnt requirements of use,

and tnat the *invention, therefore, is not 'limited to the precise details of construction and arrangement shown.

Having described my invention what I claim as new and desire to secure by Letters Patent, is

A pump comprising a cylinder, a rcciprocatory plunger working in said cylinder, a plunger rod, a foot rcst securcd to said plunger rod, a pulley, a second foot rest, and fiexible means passing over said pulley for securing said second foot rest to said plunger rod. o

In testimony whereof I have hereunto set my hand.

ANDREW L. Lewis. 

